JPS5846Y2 - Closure damper antifreeze device for alternate switching operation air conditioner - Google Patents

Description

[Detailed explanation of the invention] In this invention, a cooler is arranged in each of two parallel air passages whose ventilation is switched by a damper, and when the air cooler in one air passage is cooling the air, the cooler in the other air passage is used to cool the air. In an air conditioner in which the air passage is blocked by a damper and the cooler in this air passage is defrosted, the damper in the air passage on the side of the cooler that is being defrosted is used to block the blocked air passage. Regarding a blocking damper antifreeze device for an alternating switching operation air conditioner, which prevents freezing on the outlet seal part and thereby allows the damper to be operated without any inconvenience at the time of the next air passage switching, the following is based on the example diagram. The present invention will be explained in detail.

In the figure, 1 indicates an air-conditioned room, and 2 indicates a cold air generator.

The cold air generator 2 includes an inlet air path 3 and parallel air paths 5 a and 5 b whose flow paths are switched by a damper 4, and each of these parallel air paths 5 a and 5 b is equipped with a cooler. 6a and 6b are provided.

The outlet sides of the parallel air passages 5a and 5b are connected to an outlet air passage 8 having an outlet switching damper 7, and the air in this outlet air passage is ducted by a blower 9 from 10 to a blowout duct of the air-conditioned room 1. 11, and the air outlet 11a of this duct
The air sent into the air-conditioned room 1 from the return duct 12
The cold air is then returned to the inlet air path 3 of the cold air generator 2.

The coolers 6a and 6b are defrosters 13a and 13, respectively.
It is equipped with b.

These defrosting devices 13 a and 13 b are shown as water spray headers in the embodiment diagram, and water from the water storage tank 14 is sent to these from a water supply pipe 16 by a pump 15, and from the water spray headers to each cooler 6 a and 6 b. Water and defrost.

The water spray headers 13a, 13b are provided with normally closed water supply valves 17a, 17b, and these water supply valves 17a, 17b are opened during defrosting.

Note that reference numerals 18 a and 18 b are return pipes for returning residual water in the water spray headers 13 a and 13 b after defrosting to the storage tank 14 .

Further, branch water spray headers 13 a' and 13 for spraying water from the water spray headers 13 a and 13 b to the outlet damp puffs are provided.
b' is provided to spray water onto the inner surface of the closed damper.

Note that the water spray header 13a has a cooler 6a on the bottom surface.
In some cases, a spray nozzle for spraying the damper 7 is provided on the upper surface of the defrosting nozzle, thereby making the branch water spray header 13a' unnecessary.

The dampers 4 and 7 at the inlet and outlet are configured to selectively open and close the air passages 5 a and 5 b.

That is, when the inlet damper 4 closes the entrance of the left air passage 5a, the outlet damper also blocks the exit of the left air passage 5a, and conversely, when the artificial damper 4 closes the entrance of the right air passage 5b, the outlet damper closes the entrance of the left air passage 5a. It is designed to block the exit of the road.

Therefore, the water supply valve 1 for the water spray headers 13a and 13b
7a and 17b are designed to open water spray headers located in the blocked air passages in the air passages 5a and 5b.

Further, each damper 4, 7 is rotated in forward and reverse directions at a pivot portion 21.22 by the operation of an air or hydraulic cylinder device 19.20 to open and close the air passages 5a, 5b.

In addition, in the illustration, 23 is a condensing unit),
24a and 24b are expansion valves, 25a and 25
b is a distributor, 26 is a refrigerant outgoing pipe, 27 is a refrigerant return pipe, Vl
and ■2 is a refrigerant feed switching valve, 28 and 29 are each cooler 6 a in the water spray headers 13 a and 13 b,
6 b, and 30 and 31 indicate water spray nozzles to the outlet damp puff.

The air conditioner of the present invention has the above-mentioned structure, in which the artificial damper 4 and the outlet damper alternately open and close the air passages 5a and 5b.
Air is cooled and dehumidified by a cooler 6b in an open air path, for example, the right air path 5b in the illustration, and then sent into the air-conditioned room 1.

When cooling and dehumidifying are performed by the cooler in the right air passage, the cooler 6a in the closed left air passage 5a is defrosted by spraying water from the water spray header 13a.

When there is a lot of frost on the cooler 6a in the right air passage that is cooling and dehumidifying, the dampers 4 and 7 are switched and the right air passage 5
b is closed, while the left air passage is opened, the air is cooled and dehumidified by the cooler 5a in the left air passage, and this air is sent into the air conditioned room.

The cooler 6b in the right air passage is defrosted by spraying water from the water spray header 13b.

In this way, while cooling and dehumidifying with one cooler,
The other cooler performs defrosting and regeneration, and the air that has been cooled and dehumidified can be sent alternately and continuously from both coolers to the air-conditioned room. Moisture generated by defrosting adheres to the inner surface of the damper 7 blocking the damper 7, and this moisture is frozen by the damper 7, which is cooled by cold air from other air paths.

Due to this ice formation, the damper 7 is often frozen at the seal portion at the outlet of the air passage, making it impossible to operate when switching the air passage.

However, in this device, water is sprayed onto the inner surface of the outlet damper that closes the air passage of the cooler being defrosted, so ice does not form on the inner surface of the damper.

Therefore, the air passage switching operation of the damper 7 when switching to cooling/dehumidification after defrosting is not hindered, and the switching operation between defrosting and cooling can be performed smoothly.

In addition, since water is sprayed to the outlet damper to prevent freezing, it is applied to the inner surface of the closed outlet damper, so the sprayed water does not mix with the air in other open air passages, preventing the air from entering the air-conditioned room. can only be supplied with air at the required temperature and humidity that has been cooled and dehumidified by the cooler on the - side.

[Brief explanation of drawings]

The figure is a system diagram showing an example of the device of the present invention. In the diagram: 1...Air conditioned room, 2...Cold air generator, 3...Inlet air path, 4...Artificial damper, 5a, 5b... ...Parallel air passage, 6a, 6b
...Cooler, 7...Outlet damper 8...
...Exit air path, 9...Blower, 10...
...Air supply duct, 11...Blowout duct, 12
...Return duct, 13a, 13b...
... Defrost device, 13a, 13b ... Branch water spray header, 14 ... Water tank, 15 ... Pump, 16 ... Water supply pipe, 17a , 17b...
... Water supply valve, 18a, 18b ... Return pipe, 1
9゜20...Cylinder device, 21, 22...
... Pivot part, 23 ... Containing unit), 24 a, 24 b ... Expansion valve, 2
5a, 25b...distributor, 26...refrigerant outgoing pipe, 27...refrigerant return pipe, V1. V
2...Switching valve.

Claims (1)

[Scope of utility model registration request] A common inlet air path is followed by parallel air paths,
This parallel air path is followed by a common outlet air path, each parallel air path is provided with a cooler, and the main inlet air path and outlet air path have an inlet that alternately switches the ventilation of the parallel air path. In an air conditioner in which a damper and an outlet damper are provided, and each cooler is provided with a defrosting device, each outlet of the parallel air paths is provided with a defrosting device that operates when each air path is closed and defrosted. A blockage damper antifreeze device for an alternate operation air conditioner, which is provided with a water spray header that sprays water onto the inner surface of a closed outlet damper.